CN109155728B

CN109155728B - Method and device for sending and receiving reference signal, vehicle-mounted equipment and terminal

Info

Publication number: CN109155728B
Application number: CN201880001757.9A
Authority: CN
Inventors: 李明菊
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2021-10-26
Anticipated expiration: 2038-08-10
Also published as: RU2763931C1; BR112021002076A2; US20210235404A1; EP3836456A1; US11856537B2; WO2020029283A1; JP2021533684A; CN113824476A; EP3836456A4; KR20210038968A; CN109155728A; SG11202101346TA; JP7242831B2; CN113824476B

Abstract

The disclosure provides a method, a device, a vehicle-mounted device and a terminal for sending and receiving a reference signal, wherein the method for sending the reference signal comprises the following steps: determining transmission configuration information of a synchronization signal block VSSB in an NR V2X system, the transmission configuration information including: the sending period of the VSSB and the time domain position of the VSSB sending time window in the sending period; according to the transmission configuration information, sending N VSSB within the VSSB sending time window which appears periodically, wherein N is an integer which is more than or equal to 1; wherein each of the VSSB includes: a primary side link synchronization signal PSSS, a secondary side link synchronization signal SSSS, a physical side link broadcast channel PSBCH signal and a demodulation reference signal DMRS. By adopting the method for sending the reference signal, the time domain synchronization between the vehicle-mounted equipment and the receiving terminal in the NR V2X system can be ensured to be completed quickly.

Description

Method and device for sending and receiving reference signal, vehicle-mounted equipment and terminal

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for sending and receiving a reference signal, a vehicle-mounted device, and a terminal.

Background

In the LTE V2X (Vehicle-to-Vehicle) technology, for example, in a V2V (Vehicle-to-Vehicle communication) application scenario, since a two-Vehicle meeting situation may occur, the relative speed becomes almost twice the traveling speed of a single Vehicle, so that the doppler shift value is large. To combat the large doppler shift value, in a subframe (subframe) of 1ms, PSSS (Primary side link Synchronization Signal) and SSSS (Secondary side link Synchronization Signal) of V2X each occupy two symbols, and PSBCH (Physical side link Broadcast Channel) occupies 5 symbols, with DMRS (Demodulation Reference Signal) for demodulating 3 symbols being transmitted in the middle time for demodulating PSBCH. In addition, the 1ms subframe includes two slots, each slot includes 7 symbols, of the 14 symbols, the first symbol is used for AGC (Automatic Gain Control), that is, a device receiving PSSS/SSSS/PSBCH performs adjustment in terms of power Gain, and the last symbol is used for countering transmission and reception delays caused by devices at different positions. And the period of this synchronization signal and broadcast channel transmission is 160ms, i.e., 1ms out of 160ms, for transmitting a frame structure of the synchronization signal and broadcast channel. In addition, since the LTE sidelink uses a feature similar to that of the LTE uplink, and the uplink uses SC-FDMA (Single-carrier Frequency-Division Multiple Access), the DMRS and the PSBCH are transmitted in different symbols.

In a New Radio Access technology (NR) spectrum, each slot (slot) includes 14 symbols, and how many slots are included in 1 millisecond (ms) is determined by a subcarrier spacing. For example, a subcarrier spacing of 15 kilohertz (KHz) contains 1 slot in 1 ms; when the subcarrier interval is 30KHz, 2 slots are contained in 1 ms; and when the subcarrier interval is 60KHz, 4 slots are contained in 1ms, and so on.

In NR, in order to reduce always on (always on) Reference signals and thus reduce overhead, a Synchronization Signal Block (SSB) is proposed, where each SSB occupies 4 consecutive symbols, and sequentially and respectively includes a Primary Synchronization Signal (PSS), a Physical Broadcast Channel (PBCH), a Secondary Synchronization Signal (SSS), and a PBCH, where 12 Resource Blocks (RB) in the middle of the symbol where the SSS is located are SSS, 4 RBs on both sides are PBCH, and some subcarriers in the PBCH are Demodulation Reference signals (DMRS). The subcarrier spacing of the synchronization signal block may be 15KHz, 30KHz, 120KHz and 240 KHz. All synchronization signal blocks are transmitted within 5 ms. In order to support beam (beam) transmission, when beams exist, each beam needs to transmit an SSB, so that the maximum number of synchronization signal blocks that can be transmitted within 5ms is 4 (when the carrier frequency is 3GHz or less), 8 (when the carrier frequency is 3GHz to 6 GHz), or 64 (when the carrier frequency is 6GHz or more), and a plurality of SSBs within 5ms are called a synchronization block set (SSB burst set). The transmission period of the SSB burst set may be 5ms, 10ms, 20ms, 40ms, etc.

In the 5G NR system, the V2X technology is also introduced, but transmission of synchronization signals and broadcast channels is not yet defined.

Disclosure of Invention

In order to overcome the problems in the related art, embodiments of the present disclosure provide a method, an apparatus, a vehicle-mounted device, and a terminal for sending and receiving a reference signal, which ensure that time domain synchronization is quickly completed between the vehicle-mounted device and the receiving terminal in an NR V2X system.

According to a first aspect of the embodiments of the present disclosure, there is provided a method for transmitting a reference signal, the method including:

determining transmission configuration information of a synchronization signal block VSSB in a new air interface Internet of vehicles NR V2X system, wherein the transmission configuration information comprises: the sending period of the VSSB and the time domain position of the VSSB sending time window in the sending period;

according to the transmission configuration information, sending N VSSB within the VSSB sending time window which appears periodically, wherein N is an integer which is more than or equal to 1;

wherein each of the VSSB includes: a primary side link synchronization signal PSSS, a secondary side link synchronization signal SSSS, a physical side link broadcast channel PSBCH signal and a demodulation reference signal DMRS.

Optionally, the sending N VSSBs within the periodically occurring VSSB sending time window includes:

determining target carrier frequency information for transmitting the VSSB;

determining the maximum number of time domain resources which can be transmitted by the VSSB and correspond to one VSSB transmission time window according to the target carrier frequency information;

determining effective time domain resource information in a VSSB sending time window according to the maximum number of the time domain resources which can be sent by the VSSB and uplink and downlink time domain resource configuration information sent by a base station;

and sending the VSSB in the VSSB sending time window according to the effective time domain resource information.

Optionally, the determining target carrier frequency information for transmitting the VSSB includes:

receiving resource configuration information sent by the base station, wherein the resource configuration information is used for informing the vehicle-mounted equipment to send the VSSB by using the configured resources;

determining the target carrier frequency information according to the resource configuration information; alternatively, the first and second electrodes may be,

and determining the target carrier frequency information according to preset resource configuration information.

Optionally, the determining, according to the target carrier frequency information, a maximum number of time domain resources that can be transmitted by the VSSB within one VSSB transmission time window includes:

inquiring a preset list according to the target carrier frequency information, and determining the maximum number of time domain resources capable of being sent by the VSSB corresponding to the target carrier frequency, wherein the preset list comprises: the carrier frequency band information and the maximum number of time domain resources which can be transmitted by the VSSB transmitted in a transmission time window.

Optionally, the valid time domain resource information includes: the number of the effective unit time domain resources and the position of each effective unit time domain resource;

the determining effective time domain resource information in the VSSB transmission time window according to the maximum number of transmittable time domain resources of the VSSB and uplink and downlink time domain resource configuration information issued by the base station includes:

determining a target subcarrier interval according to the target carrier frequency information;

determining the position and index information of each unit time domain resource in a VSSB sending time window according to the maximum number of the time domain resources which can be sent by the VSSB and the target subcarrier interval, wherein the unit time domain resource is used for bearing one VSSB;

determining effective time domain resources in a current VSSB sending time window according to the uplink and downlink time domain resource configuration information, wherein the effective time domain resources comprise: uplink time domain resources and/or blank resources configured by the base station;

and determining the number of the effective unit time domain resources and the position and index information of each effective unit time domain resource according to the effective time domain resources and the position and index information of each unit time domain resource in the VSSB sending time window.

Optionally, the sending the VSSB within the VSSB sending time window according to the effective time domain resource information includes:

determining a target beam number according to preset reference information, wherein the preset reference information is used for determining the number of beams required for transmitting the VSSB in the current environment, one beam is used for transmitting at least one VSSB in a preset direction, and the target beam number is less than or equal to the maximum number of time domain resources capable of being transmitted by the VSSB;

determining transmission information of the VSSB to be transmitted based on the effective time domain resource information and the target beam number, wherein the transmission information of the VSSB to be transmitted comprises: the actual number of VSSB to be sent, the position of each VSSB to be sent occupying the effective unit time domain resource and the corresponding index information;

and sending each VSSB in the VSSB sending time window according to the transmission information of the VSSB to be sent.

Optionally, the determining transmission information of a VSSB to be transmitted based on the effective time domain resource information and the target beam number includes:

determining the actual number of the VSSB to be transmitted based on the effective time domain resource information and the target beam number;

and determining the position of each VSSB to be sent in the effective unit time domain resource and corresponding index information according to the actual number of the VSSB to be sent and the position and the index information of each effective unit time domain resource.

Optionally, determining an actual number of the VSSB to be sent based on the effective time domain resource information and the target beam number by any one of the following manners:

if the target beam number is greater than or equal to the number of the effective unit time domain resources, determining the number of the effective unit time domain resources as the actual number of the VSSB to be sent;

and if the target beam number is smaller than the number of the effective unit time domain resources, determining the target beam number as the actual number of the VSSB to be sent.

Optionally, the sending, according to the transmission information of the VSSB to be sent, each VSSB in the VSSB sending time window includes:

loading the index information of the VSSB to be sent into a setting signal of the VSSB to be sent to generate a target VSSB carrying the index information;

transmitting the target VSSB through a plurality of beams, respectively, within the VSSB transmission time window.

Optionally, the index information of the VSSB to be sent is loaded in a setting signal of the VSSB to be sent by adopting any one of the following manners:

indicating the index information of the VSSB to be sent through the corresponding DMRS target sequence;

loading the index information of the VSSB to be transmitted in a first bit of a preset PSBCH signal;

and indicating a part of bit values of the index information of the VSSB to be transmitted through a corresponding DMRS target sequence, and loading the rest bit values into a second bit of the preset PSBCH signal.

and sending the PSBCH signal and the DMRS signal in each VSSB by adopting a Frequency Division Multiplexing (FDM) mode and/or a Time Division Multiplexing (TDM) mode.

According to a second aspect of the embodiments of the present disclosure, there is provided a method of receiving a reference signal, the method including:

detecting a synchronous signal block VSSB (synchronization signal block) in a new air interface Internet of vehicles NRV2X system sent by vehicle-mounted equipment;

acquiring VSSB index information from the detected target VSSB;

determining a time domain position corresponding to the target VSSB according to the VSSB index information;

and carrying out time domain synchronization with the vehicle-mounted equipment according to the time domain position.

Optionally, the detecting the VSSB sent by the vehicle-mounted device includes:

receiving resource configuration information sent by a base station, wherein the resource configuration information is used for informing the receiving terminal to receive the VSSB by using the configured resources;

determining target carrier frequency information for receiving the VSSB according to the resource configuration information;

determining the interval of the detected sub-carriers according to the target carrier frequency information;

detecting the VSSB on a target resource using each of the detected subcarrier spacings.

Optionally, the obtaining VSSB index information from the detected target VSSB includes:

analyzing the target VSSB to obtain various signals, wherein each signal comprises: a primary side link synchronization signal PSSS, a secondary side link synchronization signal SSSS, a physical side link broadcast channel PSBCH signal and a demodulation reference signal DMRS;

acquiring the VSSB index information from a setting signal, wherein the setting signal comprises: the PSBCH signal and/or the DMRS signal.

Optionally, the acquiring the VSSB index information from the setting signal includes any one of:

acquiring the VSSB index information according to the information carried by the set DMRS sequence;

the VSSB index information is analyzed from a first bit of a set PSBCH signal.

Optionally, the acquiring the VSSB index information from the setting signal includes:

acquiring a part of bit values corresponding to the VSSB index information according to information carried by the set DMRS sequence;

obtaining a residual bit value corresponding to the VSSB index information from a second bit of a set PSBCH signal;

determining the VSSB index information according to a full bit value composed of the partial bit value and the remaining bit value.

Optionally, the determining, according to the VSSB index information, a time domain location corresponding to the VSSB includes:

determining a time domain position corresponding to the target VSSB according to the VSSB index information, the target carrier frequency information and the target subcarrier interval; wherein the target subcarrier spacing is a detection subcarrier spacing used when the target VSSB is detected.

According to a third aspect of the embodiments of the present disclosure, there is provided an apparatus for transmitting a reference signal, the apparatus including:

a configuration information determining module configured to determine transmission configuration information of a synchronization signal block VSSB in a new air interface internet of vehicles NR V2X system, where the transmission configuration information includes: the sending period of the VSSB and the time domain position of the VSSB sending time window in the sending period;

a sending module configured to send N VSSBs within the VSSB sending time window that occurs periodically according to the transmission configuration information, where N is an integer greater than or equal to 1;

Optionally, the sending module includes:

a carrier frequency determination sub-module configured to determine target carrier frequency information for transmitting the VSSB;

the resource quantity determining submodule is configured to determine the maximum time domain resource quantity capable of being transmitted by the VSSB corresponding to one VSSB transmission time window according to the target carrier frequency information;

the effective resource determining submodule is configured to determine effective time domain resource information in a VSSB sending time window according to the maximum number of the VSSB sending time domain resources and uplink and downlink time domain resource configuration information issued by the base station;

a transmitting sub-module configured to transmit the VSSB within the VSSB transmission time window according to the effective time domain resource information.

Optionally, the carrier frequency determining sub-module includes:

a configuration information receiving unit configured to receive resource configuration information transmitted by the base station, the resource configuration information being used to inform the vehicle-mounted device to transmit the VSSB using the configured resource;

a first carrier frequency determination unit configured to determine the target carrier frequency information according to the resource configuration information; alternatively, the first and second electrodes may be,

a second carrier frequency determining unit configured to determine the target carrier frequency information according to preset resource configuration information.

Optionally, the resource quantity determining sub-module is configured to query a preset list according to the target carrier frequency information, and determine the maximum VSSB time domain resource quantity that can be sent corresponding to the target carrier frequency, where the preset list includes: the carrier frequency band information and the maximum number of time domain resources which can be transmitted by the VSSB transmitted in a transmission time window.

the effective resource determination submodule includes:

a subcarrier spacing determination unit configured to determine a target subcarrier spacing according to the target carrier frequency information;

a unit time domain resource determining unit, configured to determine, according to the maximum number of time domain resources that can be transmitted by the VSSB and the target subcarrier interval, a position and index information of each unit time domain resource within one VSSB transmission time window, where the unit time domain resource is a time domain resource for carrying one VSSB;

an effective time domain resource determining unit, configured to determine, according to the uplink and downlink time domain resource configuration information, an effective time domain resource within a current VSSB transmission time window, where the effective time domain resource includes: uplink time domain resources and/or blank resources configured by the base station;

an index information determining unit configured to determine the number of the effective unit time domain resources and the position and index information of each effective unit time domain resource according to the effective time domain resource and the position and index information of each unit time domain resource within the one VSSB transmission time window.

Optionally, the sending sub-module includes:

a target beam determining unit, configured to determine a target beam number according to preset reference information, where the preset reference information is used to determine a number of beams required for transmitting the VSSB in a current environment, where one beam is used to transmit at least one VSSB in a preset direction, and the target beam number is less than or equal to a maximum number of time domain resources that can be transmitted by the VSSB;

a transmission information determining unit configured to determine transmission information of a VSSB to be transmitted based on the effective time domain resource information and the target beam number, the transmission information of the VSSB to be transmitted including: the actual number of VSSB to be sent, the position of each VSSB to be sent occupying the effective unit time domain resource and the corresponding index information;

a sending unit configured to send each VSSB within the VSSB sending time window according to transmission information of the VSSB to be sent.

Optionally, the transmission information determining unit includes:

a number determination subunit configured to determine an actual number of the VSSB to be transmitted based on the effective time domain resource information and the target beam number;

and the effective position determining subunit is configured to determine, according to the actual number of the to-be-sent VSSB and the position and the index information of each effective unit time domain resource, a position of each effective unit time domain resource occupied by the to-be-sent VSSB and corresponding index information.

Optionally, the number determining subunit is configured to any one of:

Optionally, the sending unit includes:

a target VSSB generating subunit configured to load the index information of the VSSB to be sent into a setting signal of the VSSB to be sent, and generate a target VSSB carrying index information;

a target VSSB transmission subunit configured to transmit the target VSSB through a plurality of beams, respectively, within the VSSB transmission time window.

Optionally, the target VSSB generation subunit is configured to any one of:

Optionally, the target VSSB transmitting subunit is configured to transmit the PSBCH signal and the DMRS signal in each VSSB in a Frequency Division Multiplexing (FDM) and/or Time Division Multiplexing (TDM) manner.

According to a fourth aspect of the embodiments of the present disclosure, there is provided an apparatus for receiving a reference signal, the apparatus including:

the detection module is configured to detect a synchronization signal block VSSB in a new air interface Internet of vehicles NRV2X system sent by the vehicle-mounted equipment;

an index information acquisition module configured to acquire VSSB index information from the detected target VSSB;

a position determining module configured to determine a time domain position corresponding to the target VSSB according to the VSSB index information;

and the synchronization module is configured to perform time domain synchronization with the vehicle-mounted equipment according to the time domain position.

Optionally, the detection module includes:

a configuration information receiving submodule configured to receive resource configuration information sent by a base station, where the resource configuration information is used to inform the receiving terminal to receive the VSSB using the configured resource;

a carrier frequency determination sub-module configured to determine target carrier frequency information for receiving the VSSB according to the resource configuration information;

a sub-carrier interval determining sub-module configured to determine a detected sub-carrier interval according to the target carrier frequency information;

a detection sub-module configured to detect the VSSB on a target resource using the respective detection subcarrier spacings.

Optionally, the index information obtaining module includes:

a parsing submodule configured to parse the target VSSB to obtain respective signals, the respective signals including: a primary side link synchronization signal PSSS, a secondary side link synchronization signal SSSS, a physical side link broadcast channel PSBCH signal and a demodulation reference signal DMRS;

an index information acquisition sub-module configured to acquire the VSSB index information from a setting signal including: the PSBCH signal and/or the DMRS signal.

Optionally, the index information obtaining sub-module includes:

a first index obtaining unit configured to obtain the VSSB index information according to information carried by a set DMRS sequence;

a second index acquisition unit configured to parse the VSSB index information from a first bit of a set PSBCH signal.

Optionally, the index information obtaining sub-module includes:

a first bit value determining unit configured to obtain a partial bit value corresponding to the VSSB index information according to information carried by a set DMRS sequence;

a second bit value determination unit configured to obtain a remaining bit value corresponding to the VSSB index information from a second bit of a set PSBCH signal;

a third index obtaining unit configured to determine the VSSB index information according to a complete bit value composed of the partial bit value and the remaining bit value.

Optionally, the position determining module is configured to determine a time domain position corresponding to the target VSSB according to the VSSB index information, the target carrier frequency information, and a target subcarrier interval; wherein the target subcarrier spacing is a detection subcarrier spacing used when the target VSSB is detected.

According to a fifth aspect of embodiments of the present disclosure, there is provided a non-transitory computer readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the method of any one of the first aspects described above.

According to a sixth aspect of embodiments of the present disclosure, there is provided a non-transitory computer readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the method of any one of the second aspects described above.

According to a seventh aspect of the embodiments of the present disclosure, there is provided an in-vehicle apparatus including:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to:

According to an eighth aspect of the embodiments of the present disclosure, there is provided a terminal, including:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to:

acquiring VSSB index information from the detected target VSSB;

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the embodiment of the disclosure provides a method, a device, a vehicle-mounted device and a terminal for sending and receiving a reference signal, which ensure that time domain synchronization is rapidly completed between the vehicle-mounted device and a receiving terminal in an NR V2X system.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic diagram illustrating an application scenario of an NR V2X system according to an exemplary embodiment.

Fig. 2 is a flowchart illustrating a method of transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 3 is a flow chart illustrating another method of transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 4 is a flow chart illustrating another method of transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 5 is a flow chart illustrating another method of transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 6-1 is a schematic diagram illustrating an application scenario for transmitting a reference signal according to an exemplary embodiment of the present disclosure.

Fig. 6-2 is a schematic diagram illustrating another application scenario of transmitting a reference signal according to an exemplary embodiment of the present disclosure.

Fig. 7 is a flow chart illustrating another method of transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 8-1 is a schematic diagram illustrating an application scenario for transmitting a reference signal according to an exemplary embodiment of the present disclosure.

Fig. 8-2 is a schematic diagram illustrating another application scenario of transmitting a reference signal according to an exemplary embodiment of the present disclosure.

Fig. 9 is a flow chart illustrating another method of transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 10 is a schematic diagram illustrating another application scenario of transmitting a reference signal according to an exemplary embodiment of the present disclosure.

Fig. 11 is a flow chart illustrating a method of receiving a reference signal according to an example embodiment of the present disclosure.

Fig. 12 is a flow chart illustrating another method of receiving a reference signal according to an example embodiment of the present disclosure.

Fig. 13 is a flow chart illustrating another method of receiving a reference signal according to an example embodiment of the present disclosure.

Fig. 14 is a flow chart illustrating another method of receiving a reference signal according to an example embodiment of the present disclosure.

Fig. 15 is a block diagram illustrating an apparatus for transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 16 is a block diagram illustrating another apparatus for transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 17 is a block diagram illustrating another apparatus for transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 18 is a block diagram illustrating another apparatus for transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 19 is a block diagram illustrating another apparatus for transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 20 is a block diagram illustrating another apparatus for transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 21 is a block diagram illustrating another apparatus for transmitting a reference signal according to an example embodiment of the present disclosure.

Fig. 22 is a block diagram of an apparatus for receiving a reference signal according to an example embodiment of the present disclosure.

Fig. 23 is a block diagram illustrating another apparatus for receiving a reference signal according to an example embodiment of the present disclosure.

Fig. 24 is a block diagram illustrating another apparatus for receiving a reference signal according to an example embodiment of the present disclosure.

Fig. 25 is a block diagram illustrating another apparatus for receiving a reference signal according to an example embodiment of the present disclosure.

Fig. 26 is a block diagram of another apparatus for receiving a reference signal according to an example embodiment of the present disclosure.

Fig. 27 is a schematic structural diagram of an in-vehicle apparatus shown in the present disclosure according to an exemplary embodiment.

Fig. 28 is a schematic diagram illustrating a structure of a terminal according to an exemplary embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

The execution body to which the present disclosure relates includes: an in-vehicle device and a receiving terminal in the NR V2X system, wherein V2X includes: V2V communication between vehicles, V2I (Vehicle to Infrastructure, Vehicle to roadside) representing communication between vehicles and roadside units, V2N (Vehicle to Nomadic Device) representing communication between vehicles and mobile terminals of drivers, V2P (Vehicle to pedestrian) representing communication between vehicles and mobile terminals of pedestrians, and so on, see fig. 1 for an application scenario diagram according to an exemplary embodiment. The receiving terminal may be a vehicle, a roadside infrastructure device, a pedestrian mobile terminal, or the like. In a specific implementation process, the vehicle-mounted device and the receiving terminal are independent and are mutually connected, and the technical scheme provided by the disclosure is jointly implemented.

Based on the application scenario, the disclosure provides a method for sending a reference signal, which is suitable for communication between a vehicle-mounted device and a receiving terminal through a Side Link based on a preset time-frequency domain resource configured by a base station in a 5G NR system. Wherein, the preset resources include: uplink time domain resources and/or blank resources.

Referring to fig. 2, a flowchart of a method for transmitting a reference signal according to an exemplary embodiment is shown, where the method is applied to a vehicle-mounted device, and the method may include the following steps:

in step 11, determining transmission configuration information of a synchronization signal block VSSB in a new air interface internet of vehicles NR V2X system, where the transmission configuration information includes: the sending period of the VSSB and the time domain position of the VSSB sending time window in the sending period;

in this disclosure, SSB used in the NR V2X system is simply referred to as VSSB. Wherein each of the VSSB includes: a primary side link synchronization signal PSSS, a secondary side link synchronization signal SSSS, a physical side link broadcast channel PSBCH signal and a demodulation reference signal DMRS.

In step 12, according to the transmission configuration information, N VSSBs are transmitted within the VSSB transmission time window that occurs periodically, where N is an integer greater than or equal to 1.

Assuming that the VSSB transmission period is 160ms, a VSSB transmission time window is set at a fixed position of each transmission period in the present disclosure, for example, a transmission window with a duration of 5ms is set at the 50 th ms position of 160ms, and the position of the VSSB transmission time window in the VSSB transmission period can be represented as 50ms to 54 ms.

In the present disclosure, when one VSSB transmission time window arrives, the in-vehicle apparatus transmits N VSSBs out through the wave velocity.

Referring to fig. 3, which is a flowchart illustrating another method for transmitting a reference signal according to an exemplary embodiment, step 12 may include:

in step 121, determining target carrier frequency information for transmitting the VSSB;

wherein, the target carrier frequency information includes: and the VSSB sends the frequency band and the bandwidth of the carrier frequency.

In this disclosure, the vehicle-mounted device may determine the target carrier frequency information for transmitting the VSSB in any one of the following manners:

firstly, determining the target carrier frequency information according to preset resource configuration information

For example, carrier frequency information indicating VSSB transmission is preset in a chip of the vehicle-mounted device, and the vehicle-mounted device can directly read the target carrier frequency information from the chip.

Mode two, determining target carrier frequency information according to resource configuration information issued by base station

Referring to fig. 4, which is a flowchart illustrating another method for transmitting a reference signal according to an exemplary embodiment, the step 121 may include:

in step 1211, receiving resource configuration information sent by the base station, where the resource configuration information is used to inform the vehicle-mounted device to send the VSSB using the configured resource;

as described above, in the present disclosure, the VSSB is transmitted by using the preset resource configured by the base station, and in an embodiment, the resource block configured by the base station to the vehicle-mounted device may be at the same carrier frequency as the resource used by the base station, and the resource configuration information may only indicate the location information of the RB (resource block) without indicating the carrier frequency band information.

If the resource block configured to the vehicle-mounted device by the base station and the resource used by the base station are in different carrier frequencies, the resource configuration information needs to indicate carrier frequency band information and resource block position information.

In step 1212, the target carrier frequency information is determined according to the resource allocation information.

Correspondingly, if the vehicle-mounted equipment only acquires the resource block position information from the resource configuration information, according to the protocol, the current working carrier frequency communicated with the base station is determined as the target carrier frequency for sending the VSSB.

In another embodiment, the vehicle-mounted equipment determines the target carrier frequency according to the carrier frequency band information informed by the base station.

In step 122, determining a maximum number of VSSB transmittable time domain resources within a VSSB transmission time window according to the target carrier frequency information;

in an embodiment of the present disclosure, a system may agree that a maximum number Nmax of VSSB transmittable time domain resources corresponds to carrier frequencies in different frequency bands within a transmission time window.

In the in-vehicle device, a preset list may be used to record: and the corresponding relation between the carrier frequency band information f and the maximum number Nmax of the transmittable time domain resources of the VSSB transmitted in one transmission time window. For example, the preset list may be as shown in table one:

carrier frequency band information (GHz)	Nmax
		f>M	64
L<f≤M	32
		Z<f≤L	16
Y<f≤Z	8
		X≤f≤Y	4
f<X	2

Watch 1

After the vehicle-mounted device determines the target carrier frequency for transmitting the VSSB, the table one may be queried to determine the maximum number of time domain resources, that is, Nmax, that can be transmitted by the VSSB corresponding to the target carrier frequency.

In step 123, determining effective time domain resource information in the VSSB transmission time window according to the maximum number of time domain resources that can be transmitted by the VSSB and uplink and downlink time domain resource configuration information issued by the base station;

in the present disclosure, in view of a part of time domain resources in a VSSB transmission time window that arrives periodically, it may be configured by a base station that the VSSB transmits an unavailable resource, such as a downlink time domain resource, and a vehicle-mounted device needs to accurately determine effective time domain resource information that is available for transmitting the VSSB in the VSSB transmission time window according to Nmax and uplink and downlink time domain resource configuration information issued by the base station.

Referring to fig. 5, which is a flowchart illustrating another method for transmitting a reference signal according to an exemplary embodiment, step 123 may include:

in step 1231, determining a target subcarrier interval according to the target carrier frequency information;

in the NR V2X system, the available subcarrier spacing for one carrier frequency may be multiple. For example, in the frequency bands below 6GHz, the subcarrier spacing that can be used by the system for transmitting VSSB includes: 15KHz, 30KHz, 60 KHz. In the frequency band above 6GHz, the subcarrier spacing that can be used by the system for transmitting VSSB includes: 120KHz, 240KHz, 480 KHz. The higher the frequency band to which the target carrier frequency of the vehicle-mounted device belongs, the larger the subcarrier interval used for transmitting the VSSB may be. The vehicle-mounted device may determine the target subcarrier spacing according to the current vehicle speed, for example, when the vehicle speed exceeds a preset threshold, a larger subcarrier spacing is used to counter the doppler shift.

In step 1232, determining a position and index information of each unit time domain resource within one VSSB transmission time window according to the maximum number of VSSB transmittable time domain resources and the target subcarrier interval, where the unit time domain resource is a time domain resource for carrying one VSSB;

for example, assuming that a target carrier frequency of the vehicle-mounted device belongs to a 3GHz band, and a determined target subcarrier interval is 15KHz, a slot is included in 1ms, and assuming that the VSSB transmission time window is 5ms, the VSSB transmission time window includes 5 slots, and the number of each slot may be: 0. 1, 2, 3 and 4.

If the system stipulates the 3G Hz frequency band, a unit time domain resource is set in one time slot. Assuming that the maximum number Nmax of the VSSB transmittable time domain resources determined in step 122 is 4, the position and the index information of each unit time domain resource in the VSSB transmission time window may be as shown in fig. 6-1, where the four VSSB index information are respectively: VSSB0, VSSB1, VSSB2, VSSB 3.

In another embodiment, assuming that the target carrier frequency of the vehicle-mounted device belongs to the 6GHz band, the maximum VSSB transmittable time domain resource amount determined in step 122 is equal to 8. If the protocol is specified to be in a 6GHz frequency band and the subcarrier interval is 15KHz, 2 unit time domain resources are set in each slot. As shown in fig. 6-2, the position and index information of each unit time domain resource in the VSSB transmission time window are: V0-V7.

In step 1233, determining an effective time domain resource in the current VSSB sending time window according to the uplink and downlink time domain resource configuration information, where the effective time domain resource includes: uplink time domain resources and/or blank resources configured by the base station; the blank resource is a flexible resource, that is, it is possible that the current base station does not determine that the time domain resource is used for uplink or downlink transmission. And as long as the configuration of the downlink time domain resource is not determined, the downlink time domain resource is an effective time domain resource.

In this disclosure, if the system contracts: the time domain resources within the VSSB transmission time window may be used for transmitting the VSSB when configured as uplink resources and/or blank resources.

Still referring to fig. 6-1, in an embodiment, if the time slots in which the unit time domain resources are located, i.e. the time slots numbered 0 to 3, are all configured as uplink time domain resources by the base station or are partially configured as blank resources, the time slots 0 to 3 belong to the effective time domain resources for currently transmitting the VSSB.

In another embodiment of the present disclosure, if it is determined that the timeslot No. 1 in the VSSB transmission time window is configured as a downlink time domain resource according to the uplink and downlink time domain resource configuration information, the effective time domain resources in the current VSSB transmission time window are timeslots No. 0, 2, and 3.

In step 1234, the number of the effective time domain resources and the location and index information of each effective time domain resource are determined according to the effective time domain resource and the location and index information of each unit time domain resource in the VSSB transmission time window.

In the present disclosure, according to the system convention, under the condition that the target carrier frequency information and the subcarrier interval are determined, the unit time domain resource index information corresponding to one VSSB transmission time window is preset. As shown in fig. 6-1, according to the system convention, in the case that the frequency band is 3ghz and the subcarrier interval is 15KHz, the unit time domain resource index information corresponding to one VSSB transmission time window is: VSSB0, VSSB1, VSSB2, VSSB 3.

If the timeslot number 1 is configured as a downlink resource, the number of effective unit time domain resources currently available for sending the VSSB is 3, which are: VSSB0 located in slot 0, VSSB2 located in slot 2, VSSB3 located in slot 3. The symbol range occupied by each VSSB in a slot may be system-agreed, for example: symbols #2 to #6 are symbol.

In the above embodiment, the number of the effective time domain resources determined by the vehicle-mounted device and the position and the index information of each effective time domain resource may be as shown in table two:

watch two

In step 124, the VSSB is transmitted within the VSSB transmission time window according to the effective time domain resource information.

In the present disclosure, the vehicle-mounted device may transmit the VSSB to the receiving terminal using the effective time domain resources within the current VSSB transmission time window.

Referring to fig. 7, which is a flowchart illustrating another method for transmitting a reference signal according to an exemplary embodiment, the step 124 may include:

in step 1241, determining a target number of beams according to preset reference information, where the preset reference information is used to determine a number of beams required for transmitting the VSSB in a current environment, where one of the beams is used to transmit at least one VSSB in a preset direction, and the target number of beams is less than or equal to a maximum number of time domain resources that can be transmitted by the VSSB;

in the present disclosure, after determining the maximum number Nmax of time domain resources that can be transmitted by the VSSB according to the target frequency band information, assuming that Nmax is 8, the vehicle-mounted device generally needs to transmit the VSSB in different directions using 8 beams. Wherein one beam is used for transmitting at least one VSSB in one preset direction. That is, the number of beams transmitting the VSSB is generally equal to the maximum number of transmittable time domain resources of the VSSB.

In an embodiment of the present disclosure, to save power consumption, the vehicle-mounted device may further determine the number of beams that need to be actually transmitted in combination with preset reference information, such as the number and distribution conditions of surrounding receiving terminals, and topographic information of the current geographic location.

For example, in the V2V system, if the vehicle-mounted device is currently traveling along a mountain and one side is close to a mountain, the vehicle-mounted device does not need to transmit the VSSB in the direction of the mountain, so the number of beams to be transmitted can be reduced, for example, to 4.

In step 1242, based on the effective time domain resource information and the target beam number, determining transmission information of a VSSB to be transmitted, where the transmission information of the VSSB to be transmitted includes: the actual number of VSSB to be sent, the position of each VSSB to be sent occupying the effective unit time domain resource and the corresponding index information;

after determining the target number of beams, the vehicle-mounted device may determine the actual number of VSSBs to be transmitted based on the effective time domain resource information and the target number of beams, which may include the following two cases:

the first condition is as follows: if the target beam number is greater than or equal to the number of the effective unit time domain resources, determining the number of the effective unit time domain resources as the actual number of the VSSB to be sent;

for example, as shown in fig. 8-1, when the time slot 1 in the VSSB transmission time window shown in fig. 6-1 is configured as a downlink resource, the number of valid time domain resources in the VSSB transmission time window is equal to 3, and is less than the target beam number 4, the vehicle-mounted device determines the number of VSSBs to be transmitted to be 3

And in case two, if the number of the target beams is smaller than the number of the effective unit time domain resources, determining the number of the target beams as the actual number of the VSSB to be transmitted.

For example, as shown in fig. 8-2, when slot 1 in the VSSB transmission time window shown in fig. 6-2 is configured as a downlink resource, the number of effective time domain resources is equal to 6 and is greater than the target beam number 4, the number of VSSBs to be transmitted may be determined to be 4

After determining the actual number of VSSBs to be transmitted, the position and index information of the effective unit time domain resource occupied by each VSSB to be transmitted are determined according to the position and index information of the effective unit time domain resource determined in step 1234. As shown in fig. 8-1, the effective unit time domain resources corresponding to the index information VSSB0, VSSB2, VSSB3 are used for transmitting the VSSB.

In another embodiment of the present disclosure, corresponding to the case that the number of effective time domain resources is greater than the number of VSSBs to be sent, as shown in fig. 8-2, the number of VSSBs to be sent is equal to 4, and the number of effective time domain resources is equal to 6. The vehicle-mounted device can arbitrarily select 4 VSSBs for transmission from the above-described 6 effective unit time domain resources (V0, V1, V4, V5, V6, V7). For example, the transmission is selected at the corresponding positions of V0, V1, V4, and V5, or may be selected at the positions of V0, V1, V6, and V7, or at the positions of V4, V5, V6, and V7, or at four non-consecutive positions, which is not limited in this disclosure.

In step 1243, each VSSB is transmitted within the VSSB transmission time window according to the transmission information of the VSSB to be transmitted.

Fig. 8-1 shows a schematic diagram of sending VSSBs when the number of VSSBs to be sent is 3 and the effective unit time domain resource is also equal to 3, that is, 3 VSSBs are sent at the positions with index information of VSSB0, VSSB2, and VSSB3, respectively.

Fig. 8-2 is a schematic view of an application scenario in which, when the number of VSSBs to be transmitted is less than the number of effective unit time domain resources, the vehicle-mounted device selects a time domain position before a VSSB transmission time window to transmit each VSSB. Namely, 4 VSSBs to be transmitted are transmitted at positions having index information of V0, V1, V4, and V5, respectively.

In this disclosure, when the vehicle-mounted device uses the effective unit time domain resource to send the VSSB to the receiving terminal, the receiving terminal needs to carry the index information of the effective unit time domain resource, so that the receiving terminal performs time domain synchronization with the vehicle-mounted device according to the index information.

Referring to fig. 9, which is a flowchart illustrating another method for transmitting a reference signal according to an exemplary embodiment, the step 1243 may include:

in step 1201, the index information of the VSSB to be sent is loaded in a setting signal of the VSSB to be sent, and a target VSSB carrying the index information is generated;

in the embodiment shown in fig. 8-1, for a VSSB to be transmitted at the VSSB3 location, the vehicle-mounted device may transmit index information VSSB3 carried in a setting signal of the VSSB, such as a DMRS signal and/or a PSBCH signal, to the receiving terminal.

In this disclosure, the index information of the VSSB to be transmitted may be loaded in the setting signal of the VSSB to be transmitted by any one of the following manners:

in a first mode, the index information of the VSSB to be sent is indicated through the corresponding DMRS target sequence;

taking an example that one VSSB transmission time window shown in fig. 6-1 includes 4 pieces of index information, in the present disclosure, a system may agree on a correspondence relationship between the index information and a DMRS sequence, as shown in table three for an example:

index information	DMRS sequences
		VSSB
0	*
		VSSB 1	**
VSSB 2	***
		VSSB 3	****

Watch III

Referring to table three, the vehicle-mounted device may load a sequence "×", corresponding to the VSSB3, in the DMRS signal of the VSSB. The above index information is indicated by DMRS sequence "×": VSSB 3.

in another embodiment, the index information may be loaded in reserved information bits or new information bits of the preset PSBCH signal, referred to as a first bit in the present disclosure, for example, the bit value 11 corresponding to the VSSB3 is placed in 2 reserved bits or new bits of the preset PSBCH signal to indicate the index information.

And thirdly, indicating a part of bit values of the index information of the VSSB to be transmitted through a corresponding DMRS target sequence, and loading the rest bit values into a second bit of the preset PSBCH signal.

In another disclosed embodiment, the index information may also be represented by combining a DMRS target sequence and bit information set in a preset PSBCH signal.

Still as an example above, for the index information VSSB3, whose corresponding bit value is 11, in the embodiment of the present disclosure, a bit value "1" located at a lower position may be indicated by using a preset DMRS target sequence such as "x", and a bit value "1" located at a higher position may be placed in a reserved bit or a new bit in a preset PSBCH signal, which is referred to as a second bit in the PSBCH signal for carrying part of the index information. In another embodiment of the present disclosure, the system may also agree to indicate a high-order bit value corresponding to the index information through the DMRS target sequence, and correspondingly, indicate a remaining bit value in a second bit in the preset PSBCH signal, which is not limited in the present disclosure.

In the present disclosure, a VSSB to be transmitted, which carries VSSB index information, is referred to as a target VSSB.

In step 1202, the target VSSB is transmitted through a plurality of beams, respectively, within the VSSB transmission time window occurring periodically.

In the present disclosure, one beam is used to transmit the target VSSB in different directions at different times, for example, in the example shown in fig. 8-1, at a time domain position corresponding to the VSSB0 of the first time slot of 5ms, one beam is used to transmit the target VSSB carrying the index information VSSB0 in one direction; in the time domain position corresponding to the 3 rd time slot VSSB2, a beam is used for sending a target VSSB carrying index information VSSB2 towards the other direction; and so on.

In addition, in the present disclosure, regarding how the vehicle-mounted device transmits the PSBCH signal and the DMRS signal of one VSSB within the VSSB transmission time window, the present disclosure may adopt the following three transmission modes:

in the first transmission mode, the PSBCH signal and the DMRS signal in one VSSB are transmitted in a TDM (Time Division Multiplexing) mode, that is, the PSBCH signal and the DMRS signal are transmitted in Time-frequency resources corresponding to different symbols, and in this mode, the frequency domains of the PSBCH signal and the DMRS signal may be the same, but the Time domains of the PSBCH signal and the DMRS signal are different.

In the second transmission mode, the PSBCH signal and the DMRS signal in one VSSB are transmitted in an FDM (Frequency Division Multiplexing) mode, that is, the PSBCH signal and the DMRS signal may be transmitted in different Frequency domain resources corresponding to the same symbol, and in this mode, the time domains of the PSBCH signal and the DMRS signal may be the same, but the Frequency domains of the PSBCH signal and the DMRS signal are different.

And in the third transmission mode, the PSBCH signal and the DMRS signal are transmitted in a mode of combining TDM and FDM. Referring to fig. 10, which is a schematic diagram of another application scenario for transmitting a reference signal according to an exemplary embodiment, in a time-frequency resource occupied by a PSBCH signal and corresponding to a symbol, for example, #5 symbol, for example, in 12 REs (resource elements) included in any one RB, there are some resources, for example, RE #3, RE #7, RE #11, used to transmit a DMRS signal, and the remaining REs are used to transmit the PSBCH signal. In addition, DMRS signals are also transmitted in time-frequency resources corresponding to the #6 symbol (not shown in the figure). And in the symbol having both PSBCH and DMRS, the proportion of REs occupied by DMRS may be 1/3 or 1/4, etc.

In summary, the present disclosure designs a reference signal transmission method for a 5G NR V2X system, where an on-board device may transmit a reference signal to receiving terminals in different directions through a beam in a synchronization signal block VSSB structure within a VSSB transmission time window that arrives periodically, so that after receiving the VSSB transmitted by the on-board device, the receiving terminal may quickly perform time domain synchronization with the on-board device by using the reference signal in the VSSB and index information carried in the VSSB, thereby improving the time domain synchronization efficiency between the receiving terminal and the on-board device, reducing the time spent on signal synchronization, and ensuring the immediacy of communication between the on-board device and the receiving terminal.

Correspondingly, the disclosure also provides a method for receiving the reference signal, which is applied to the receiving terminal of the NR V2X system.

Referring to fig. 11, a flowchart of a method of receiving a reference signal according to an example embodiment is shown, which may include:

in step 21, detecting a synchronization signal block VSSB in a new air interface internet of vehicles NR V2X system sent by the vehicle-mounted device;

in an embodiment of the present disclosure, the receiving terminal may also determine target carrier frequency information through system appointed carrier frequency information built in the chip, or resource configuration information sent by the receiving base station, where the target carrier frequency is a carrier frequency used by the receiving terminal to receive the VSSB from the vehicle-mounted device.

In an embodiment, referring to fig. 12, which is a flowchart illustrating another method for receiving a reference signal according to an exemplary embodiment, the step 21 may include:

in step 211, receiving resource configuration information sent by a base station, where the resource configuration information is used to inform the receiving terminal to receive the VSSB using the configured resource;

in step 212, determining target carrier frequency information for receiving the VSSB according to the resource configuration information;

similar to the

steps

1211 and 1212, in the embodiment of the present disclosure, the base station may also send resource configuration information to the receiving terminal to inform the receiving terminal of which carrier frequency to receive the VSSB sent by the vehicle-mounted device.

In step 213, determining a detected subcarrier interval according to the target carrier frequency information;

assume that the receiving terminal such as vehicle B determines that the carrier frequency used for receiving the VSSB is a carrier frequency in the 3GHz band. The system protocol specifies that the available subcarrier spacing of a carrier frequency in a frequency band may be one or more, and the receiving terminal may determine each available subcarrier spacing as a detected subcarrier spacing, for example, the detected subcarrier spacing corresponding to the 3GHz frequency band may include: 15KHz and 30 KHz.

In step 214, the VSSB is detected on a target resource using each of the detected subcarrier spacings.

As in the above example, the receiving terminal may monitor the VSSB using 15KHz, 30KHz, and determine a detected subcarrier spacing used when the VSSB is detected as a target subcarrier spacing, such as 15 KHz.

In step 22, acquiring VSSB index information from the detected target VSSB;

referring to fig. 13, which is a flowchart illustrating another method for receiving a reference signal according to an exemplary embodiment, the step 22 may include:

in step 221, the target VSSB is parsed to obtain respective signals, which include: a primary side link synchronization signal PSSS, a secondary side link synchronization signal SSSS, a physical side link broadcast channel PSBCH signal and a demodulation reference signal DMRS;

in step 222, the VSSB index information is obtained from a setting signal.

The setting signal may be a preset PSBCH signal, a preset DMRS signal contained in the target VSSB, or a combination thereof.

Corresponding to the above step 1201, in the present disclosure, the receiving terminal may acquire the VSSB index information from the setting signal in the target VSSB in any one of the following manners:

the method comprises the steps that firstly, VSSB index information is obtained according to information carried by a set DMRS sequence;

for example, assuming that DMRS sequences carried in the preset DMRS signal are at, and under the condition that the query system agrees, the frequency band of 3GHz and the subcarrier spacing is 15KHz, the corresponding relationship between the index information and the DMRS sequences may be determined, as shown in table three above, that the index information of the target VSSB is VSSB 3.

In the second method, the VSSB index information is analyzed from the first bit of the set PSBCH signal.

Corresponding to the second embodiment of step 1201, for example, if the information bit value detected in the first bit of the preset PSBCH signal of the target VSSB is 11, it may be determined that the VSSB index information carried by the target VSSB is VSSB 3.

Third mode, obtaining VSSB index information from preset PSBCH signal and preset DMRS signal

Referring to fig. 14, which is a flowchart illustrating another method for receiving a reference signal according to an exemplary embodiment, the step 222 may include:

in step 2221, a partial bit value corresponding to the VSSB index information is obtained according to information carried by the set DMRS sequence;

in step 2222, obtaining a remaining bit value corresponding to the VSSB index information from a second bit of the set PSBCH signal;

in step 2223, the VSSB index information is determined according to a full bit value composed of the partial bit value and the remaining bit value.

Corresponding to the embodiment of the step 1201, if the bit value corresponding to the DMRS sequence carried by the preset DMRS signal of the target VSSB is 1; the bit value obtained from the second bit of the set PSBCH signal of the target VSSB is 1. If the system appoints to preset DMRS sequences carried by DMRS signals to indicate high bit values in the bit values corresponding to the VSSB index information; and setting the numerical value of the second bit of the PSBCH signal as the lower bit value in the corresponding bit values of the VSSB index information. Or the system appoints to preset a low-order bit value in the bit values corresponding to the VSSB index information indicated by the DMRS sequence carried by the DMRS signal; and setting the numerical value of the second bit of the PSBCH signal as the upper bit value in the corresponding bit values of the VSSB index information. Determining that the complete bit value corresponding to the VSSB index information corresponding to the target VSSB is 11 according to the information carried by the set DMRS sequence and the second bit value of the set PSBCH signal, thereby determining that the VSSB index information of the target VSSB is: VSSB 3.

In step 23, determining a time domain position corresponding to the target VSSB according to the VSSB index information;

specifically, the receiving terminal determines a time domain position corresponding to the target VSSB according to the VSSB index information, the target carrier frequency information, and the target subcarrier interval. Still taking the target carrier frequency as 3ghz, the target subcarrier spacing as 15KHz, and the VSSB index information as VSSB3 as an example, according to fig. 6-1, the precise time domain position of the target VSSB in the transmission time window, that is, the #2 to #6 symbols in the fourth slot, that is, the slot with sequence number 3, in the VSSB transmission time window can be determined.

And step 24, performing time domain synchronization with the vehicle-mounted equipment according to the time domain position.

While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present disclosure is not limited by the order of acts, as some steps may, in accordance with the present disclosure, occur in other orders and concurrently.

Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that acts and modules referred to are not necessarily required by the disclosure.

Corresponding to the embodiment of the application function implementation method, the disclosure also provides an embodiment of an application function implementation device and a corresponding terminal.

Correspondingly, the disclosure provides a device for sending a reference signal, which can be arranged in vehicle-mounted equipment. Referring to fig. 15, a block diagram of an apparatus for transmitting a reference signal according to an exemplary embodiment is shown, the apparatus may include:

a configuration information determining module 31, configured to determine transmission configuration information of a synchronization signal block VSSB in a new air interface internet of vehicles NR V2X system, where the transmission configuration information includes: the sending period of the VSSB and the time domain position of the VSSB sending time window in the sending period;

a sending module 32, configured to send N VSSBs within the VSSB sending time window that occurs periodically according to the transmission configuration information, where N is an integer greater than or equal to 1;

Referring to fig. 16, which is a block diagram of an apparatus for transmitting a reference signal according to an exemplary embodiment, on the basis of the apparatus embodiment shown in fig. 15, the transmitting module 32 may include:

a carrier frequency determination submodule 321 configured to determine target carrier frequency information for transmitting the VSSB;

a resource quantity determining submodule 322 configured to determine, according to the target carrier frequency information, a maximum transmittable time domain resource quantity of a VSSB within a VSSB transmission time window;

in an embodiment of the present disclosure, the resource quantity determining sub-module 322 may be configured to query a preset list according to the target carrier frequency information, and determine a maximum transmittable time domain resource quantity of a VSSB corresponding to the target carrier frequency, where the preset list includes: the carrier frequency band information and the maximum number of time domain resources which can be transmitted by the VSSB transmitted in a transmission time window.

An effective resource determining submodule 323 configured to determine effective time domain resource information within the VSSB transmission time window according to the maximum number of transmittable time domain resources of the VSSB and uplink and downlink time domain resource configuration information issued by the base station;

a transmitting sub-module 324 configured to transmit the VSSB within the VSSB transmission time window according to the effective time domain resource information.

Referring to fig. 17, which is a block diagram of an apparatus for transmitting a reference signal according to an exemplary embodiment, on the basis of the apparatus embodiment shown in fig. 16, the carrier frequency determining sub-module 321 may include:

a configuration information receiving unit 3211 configured to receive resource configuration information transmitted by the base station, the resource configuration information being used to inform the vehicle-mounted device to transmit the VSSB using the configured resource;

a first carrier frequency determining unit 3212 configured to determine the target carrier frequency information according to the resource configuration information; alternatively, the first and second electrodes may be,

the second carrier frequency determining unit 3213 is configured to determine the target carrier frequency information according to preset resource configuration information.

In an embodiment of the present disclosure, the effective time domain resource information determined by the effective resource determining sub-module 323 may include: the number of the effective unit time domain resources and the position of each effective unit time domain resource.

Referring to fig. 18, which is a block diagram of an apparatus for transmitting a reference signal according to an exemplary embodiment, on the basis of the apparatus embodiment shown in fig. 16, the effective resource determining sub-module 323 may include:

a subcarrier interval determination unit 3231 configured to determine a target subcarrier interval according to the target carrier frequency information;

a unit time domain resource determining unit 3232, configured to determine, according to the maximum number of time domain resources that can be transmitted by the VSSB and the target subcarrier interval, a position and index information of each unit time domain resource in one VSSB transmission time window, where the unit time domain resource is a time domain resource used for carrying one VSSB;

an effective time domain resource determining unit 3233, configured to determine, according to the uplink and downlink time domain resource configuration information, effective time domain resources within a current VSSB transmission time window, where the effective time domain resources include: uplink time domain resources and/or blank resources configured by the base station;

an index information determining unit 3234, configured to determine, according to the effective time domain resource and the position and index information of each unit time domain resource within the one VSSB transmission time window, the number of the effective unit time domain resources and the position and index information of each effective unit time domain resource.

Referring to fig. 19, which is a block diagram of an apparatus for transmitting a reference signal according to an exemplary embodiment, on the basis of the apparatus embodiment shown in fig. 16, the transmitting sub-module 324 may include:

a target beam determining unit 3241, configured to determine a target beam number according to preset reference information, where the preset reference information is used to determine a number of beams required for transmitting the VSSB in a current environment, where one beam is used to transmit at least one VSSB in one preset direction, and the target beam number is less than or equal to a maximum number of time domain resources that can be transmitted by the VSSB;

a transmission information determining unit 3242, configured to determine, based on the effective time domain resource information and the target beam number, transmission information of a VSSB to be transmitted, where the transmission information of the VSSB to be transmitted includes: the actual number of VSSB to be sent, the position of each VSSB to be sent occupying the effective unit time domain resource and the corresponding index information;

a transmitting unit 3243, configured to transmit each VSSB to be transmitted within the VSSB transmission time window according to transmission information of the VSSB.

Referring to fig. 20, which is a block diagram of an apparatus for transmitting a reference signal according to an exemplary embodiment, on the basis of the apparatus embodiment shown in fig. 19, the transmission information determining unit 3242 may include:

a number determination subunit 32421 configured to determine, based on the effective time domain resource information and the target beam number, an actual number of VSSBs to be transmitted;

in the present disclosure, the number determination subunit is configured to be any one of:

An effective location determining subunit 32422, configured to determine, according to the actual number of the to-be-sent VSSB and the location and the index information of each effective unit time domain resource, a location and corresponding index information of each effective unit time domain resource occupied by the to-be-sent VSSB.

Referring to fig. 21, which is a block diagram of an apparatus for transmitting a reference signal according to an exemplary embodiment, on the basis of the embodiment of the apparatus shown in fig. 19, the transmitting unit 3243 may include:

a target VSSB generating subunit 32431 configured to load the index information of the VSSB to be sent into a setting signal of the VSSB to be sent, and generate a target VSSB carrying the index information;

in an apparatus embodiment of the present disclosure, the target VSSB generating subunit 32431 may be configured to any one of:

A target VSSB transmitting subunit 32432 configured to transmit the target VSSB through a plurality of beams, respectively, within the VSSB transmission time window.

In this disclosure, the target VSSB transmitting subunit 32432 may be configured to transmit the PSBCH signal and the DMRS signal in each VSSB in a frequency division multiplexing, FDM, and/or time division multiplexing, TDM manner.

Correspondingly, the disclosure also provides a device for receiving the reference signal, which is arranged in the receiving terminal. Referring to fig. 22, a block diagram of an apparatus for receiving a reference signal according to an exemplary embodiment is shown, the apparatus may include:

the detection module 41 is configured to detect a synchronization signal block VSSB in a new air interface internet of vehicles NRV2X system, which is sent by an in-vehicle device;

an index information acquisition module 42 configured to acquire VSSB index information from the detected target VSSB;

a location determining module 43, configured to determine a time domain location corresponding to the target VSSB according to the VSSB index information;

a synchronization module 44 configured to perform time domain synchronization with the vehicle-mounted device according to the time domain position.

Referring to fig. 23, which is a block diagram of another apparatus for receiving a reference signal according to an exemplary embodiment, on the basis of the embodiment of the apparatus shown in fig. 22, the detecting module 41 may include:

a configuration information receiving sub-module 411 configured to receive resource configuration information sent by a base station, where the resource configuration information is used to inform the receiving terminal to receive the VSSB using the configured resource;

a carrier frequency determining sub-module 412 configured to determine target carrier frequency information for receiving the VSSB according to the resource configuration information;

a sub-carrier spacing determination sub-module 413 configured to determine a detected sub-carrier spacing according to the target carrier frequency information;

a detection submodule 414 configured to detect the VSSB on a target resource using each of the detected subcarrier spacings.

Referring to fig. 24, which is a block diagram of another apparatus for receiving a reference signal according to an exemplary embodiment, on the basis of the apparatus embodiment shown in fig. 22, the index information obtaining module 42 may include:

a parsing submodule 421 configured to parse the target VSSB to obtain respective signals, the respective signals including: a primary side link synchronization signal PSSS, a secondary side link synchronization signal SSSS, a physical side link broadcast channel PSBCH signal and a demodulation reference signal DMRS;

an index information obtaining sub-module 422 configured to obtain the VSSB index information from a setting signal, the setting signal including: the PSBCH signal and/or the DMRS signal.

Referring to fig. 25, which is a block diagram of another apparatus for receiving a reference signal according to an exemplary embodiment, on the basis of the apparatus embodiment shown in fig. 24, the index information obtaining sub-module 422 may include:

a first index obtaining unit 4221 configured to obtain the VSSB index information according to information carried by a set DMRS sequence;

a second index acquisition unit 4222 configured to analyze the VSSB index information from a first bit of a set PSBCH signal.

Referring to fig. 26, a block diagram of another apparatus for receiving a reference signal according to an exemplary embodiment is shown, on the basis of the embodiment of the apparatus shown in fig. 24, the index information obtaining sub-module includes:

a first bit value determining unit 4223 configured to obtain a partial bit value corresponding to the VSSB index information according to information carried by the set DMRS sequence;

a second bit value determination unit 4224 configured to obtain a remaining bit value corresponding to the VSSB index information from a second bit of the set PSBCH signal;

a third index obtaining unit 4225 configured to determine the VSSB index information according to a complete bit value composed of the partial bit value and the remaining bit value.

In another apparatus embodiment of the present disclosure, the location determining module may be configured to determine a time domain location corresponding to the target VSSB according to the VSSB index information, the target carrier frequency information, and a target subcarrier spacing; wherein the target subcarrier spacing is a detection subcarrier spacing used when the target VSSB is detected.

For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the disclosed solution. One of ordinary skill in the art can understand and implement it without inventive effort.

Accordingly, an aspect provides an in-vehicle apparatus, including:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to:

In another aspect, a terminal is provided, including:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to:

acquiring VSSB index information from the detected target VSSB;

As shown in fig. 27, fig. 27 is a schematic structural view of an in-vehicle apparatus 2700 according to an exemplary embodiment. Referring to fig. 27, the base station 2700 includes a processing component 2722, a radio transmitting/receiving component 2724, an antenna component 2726, and a signal processing portion specific to a radio interface, and the processing component 2722 may further include one or more processors.

One of the processors in the processing component 2722 may be configured to:

In an exemplary embodiment, a non-transitory computer readable storage medium including instructions stored thereon, which are executable by the processing component 2722 of the in-vehicle device 2700 to perform the method of transmitting a reference signal described in fig. 2 to 10 is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Fig. 28 is a block diagram illustrating a terminal 2800 according to an example embodiment. For example, terminal 2800 can be a user device, which can be specifically a mobile phone, a computer, a digital broadcast terminal, a messaging device, a gaming console, a tablet device, a medical device, a fitness device, a personal digital assistant, a wearable device such as a smart watch, smart glasses, smart band, smart running shoe, and the like.

Referring to fig. 28, terminal 2800 may include one or more of the following components: processing component 2802, memory 2804, power component 2806, multimedia component 2808, audio component 2810, interface for input/output (I/O) 2812, sensor component 2814, and communications component 2816.

The processing component 2802 generally controls overall operation of the terminal 2800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 2802 may include one or more processors 2820 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 2802 can include one or more modules that facilitate interaction between the processing component 2802 and other components. For example, the processing component 2802 can include a multimedia module to facilitate interaction between the multimedia component 2808 and the processing component 2802.

The memory 2804 is configured to store various types of data to support operation on the terminal 2800. Examples of such data include instructions for any application or method operating on terminal 2800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 2804 may be implemented by any type or combination of volatile or non-volatile storage devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power supply components 2806 provide power to the various components of terminal 2800. Power components 2806 can include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for terminal 2800.

The multimedia assembly 2808 includes a screen that provides an output interface between the terminal 2800 and a user as described above. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of the touch or slide action but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 2808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the terminal 2800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 2810 is configured to output and/or input audio signals. For example, audio component 2810 includes a Microphone (MIC) configured to receive external audio signals when terminal 2800 is in operating modes, such as a call mode, a record mode, and a voice recognition mode. The received audio signals may further be stored in memory 2804 or transmitted via communications component 2816. In some embodiments, the audio component 2810 also includes a speaker for outputting audio signals.

I/O interface 2812 provides an interface between processing component 2802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

Sensor assembly 2814 includes one or more sensors for providing various aspects of state evaluation for terminal 2800. For example, sensor assembly 2814 can detect an open/closed state of terminal 2800, the relative positioning of components, such as a display and keypad of terminal 2800, sensor assembly 2814 can also detect a change in the position of terminal 2800 or a component of terminal 2800, the presence or absence of user contact with terminal 2800, orientation or acceleration/deceleration of terminal 2800, and a change in the temperature of terminal 2800. Sensor assembly 2814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 2814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 2814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communications component 2816 is configured to facilitate communications between terminal 2800 and other devices in a wired or wireless manner. The terminal 2800 can access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G LTE, 5G NR, or a combination thereof. In an exemplary embodiment, the communication component 2816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 2816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal 2800 can be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 2804 comprising instructions, executable by the processor 2820 of the terminal 2800 to perform the method of receiving reference signals described in any of fig. 11-14 above is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method for transmitting a reference signal, the method comprising:

wherein each of the VSSB includes: a primary side link synchronization signal PSSS, a secondary side link synchronization signal SSSS, a physical side link broadcast channel PSBCH signal and a demodulation reference signal DMRS; the maximum number of VSSB transmittable time domain resources within one VSSB transmission time window is determined based on target carrier frequency information for transmitting the VSSB.

2. The method of claim 1, wherein said transmitting N number of said VSSB's within said VSSB transmission time window that occurs periodically comprises:

determining target carrier frequency information for transmitting the VSSB;

3. The method of claim 2, wherein the determining target carrier frequency information for transmitting the VSSB comprises:

receiving resource configuration information sent by the base station, wherein the resource configuration information is used for informing vehicle-mounted equipment to send the VSSB by using the configured resources;

4. The method of claim 2, wherein the determining the maximum number of time domain resources that can be transmitted by the VSSB within a VSSB transmission time window according to the target carrier frequency information comprises:

5. The method of claim 2, wherein the valid time domain resource information comprises: the number of the effective unit time domain resources and the position of each effective unit time domain resource;

6. The method of claim 5, wherein the transmitting the VSSB within the VSSB transmission time window according to the valid time domain resource information comprises:

determining a target beam number according to preset reference information, wherein the preset reference information is used for determining the number of beams required for sending the VSSB in the current environment, one of the beams for sending the VSSB in the current environment is used for sending at least one VSSB in a preset direction, and the target beam number is less than or equal to the maximum number of time domain resources capable of being sent by the VSSB;

7. The method of claim 6, wherein the determining transmission information of a VSSB to be transmitted based on the effective time domain resource information and the target number of beams comprises:

8. The method of claim 7, wherein the actual number of VSSB to be transmitted is determined based on the effective time domain resource information and the target number of beams by any one of:

9. The method of claim 7, wherein the transmitting each VSSB within the VSSB transmission time window according to transmission information of the VSSB to be transmitted comprises:

10. The method according to claim 9, wherein the index information of the VSSB to be transmitted is loaded in the setting signal of the VSSB to be transmitted by any one of the following methods:

11. The method of claim 1, wherein said transmitting N number of said VSSB's within said VSSB transmission time window that occurs periodically comprises:

12. An apparatus for transmitting a reference signal, the apparatus comprising:

13. The apparatus of claim 12, wherein the sending module comprises:

14. The apparatus of claim 13, wherein the carrier frequency determination sub-module comprises:

a configuration information receiving unit configured to receive resource configuration information transmitted by the base station, the resource configuration information being used to inform an in-vehicle device to transmit the VSSB using the configured resource;

15. The apparatus of claim 13, wherein the resource quantity determining sub-module is configured to query a preset list according to the target carrier frequency information, and determine a maximum VSSB transmittable time domain resource quantity corresponding to the target carrier frequency, wherein the preset list comprises: the carrier frequency band information and the maximum number of time domain resources which can be transmitted by the VSSB transmitted in a transmission time window.

16. The apparatus of claim 13, wherein the valid time domain resource information comprises: the number of the effective unit time domain resources and the position of each effective unit time domain resource;

the effective resource determination submodule includes:

17. The apparatus of claim 16, wherein the transmit submodule comprises:

a target beam determining unit, configured to determine a target number of beams according to preset reference information, where the preset reference information is used to determine a number of beams required to transmit the VSSB in a current environment, where one of the beams transmitting the VSSB in the current environment is used to transmit at least one VSSB in a preset direction, and the target number of beams is less than or equal to a maximum number of transmittable time domain resources of the VSSB;

18. The apparatus of claim 17, wherein the transmission information determining unit comprises:

19. The apparatus of claim 18, wherein the number determination subunit is configured to any one of:

20. The apparatus of claim 18, wherein the sending unit comprises:

21. The apparatus of claim 20, wherein the target VSSB generation subunit is configured to either:

22. The apparatus of claim 20, wherein the target VSSB transmitting subunit is configured to transmit the PSBCH signal and the DMRS signal in each VSSB in a frequency division multiplexing, FDM, and/or time division multiplexing, TDM manner.

23. A non-transitory computer readable storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method of any of claims 1 to 11.

24. An in-vehicle apparatus, characterized by comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to: